<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>分类参数</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 头部警告区域 -->
            <el-alert
                title="注意:只允许为三级分类设置相关参数！"
                type="warning"
                :closable="false" show-icon=""
                >
            </el-alert>
            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
              <el-col>
                  <span>选择商品分类</span>
                  <!-- 选择商品分类级联选择框 -->
                   <el-cascader
                            v-model="selectedCateKeys"
                            :options="catelist"
                            :props="{
                            expandTrigger: 'hover',
                            ...cateProps,
                            // checkStrictly: 'true'
                            }"
                            @change="handleChange" clearable>
                    </el-cascader>
              </el-col>
            </el-row>
            <!-- tab页签区 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                    <!-- 动态参数表格 -->
                    <el-table :data="manyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <!-- 展开行的内容 循环渲染tag标签区域 -->
                            <template slot-scope="scope">
                                <el-tag  v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 添加新tag 区域-->
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)"
                                    >
                                    </el-input>
                                <!-- 添加的按钮 -->
                                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                      <el-table-column type="index" label="#"></el-table-column>
                      <!-- 参数名称 -->
                      <el-table-column  label="参数名称" prop="attr_name"></el-table-column>
                      <el-table-column  label="操作">
                         <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                         </template>
                      </el-table-column>
                    </el-table>
                </el-tab-pane>
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
                        <!-- 静态参数表格 -->
                        <el-table :data="onlyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <!-- 展开行的内容 循环渲染tag标签区域 -->
                            <template slot-scope="scope">
                                <el-tag  v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 添加新tag 区域-->
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)"
                                    >
                                    </el-input>
                                <!-- 添加的按钮 -->
                                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                      <el-table-column type="index" label="#"></el-table-column>
                      <!-- 参数名称 -->
                      <el-table-column  label="属性名称" prop="attr_name"></el-table-column>
                      <el-table-column  label="操作">
                         <template slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                         </template>
                      </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>
        <!-- 添加参数/属性的对话框 -->
        <el-dialog
            :title="'添加'+tittleText"
            :visible.sync="addDialogVisible"
            width="50%" @close="addDialogClose">
            <!-- 添加参数表单 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="tittleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改参数/属性的对话框 -->
        <el-dialog
            :title="'修改'+tittleText"
            :visible.sync="editDialogVisible"
            width="50%" @close="editDialogClose">
            <!-- 添加参数表单 -->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="tittleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 商品分类列表
            catelist:[],
            // 级联选择框的配置对象
            cateProps:{
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'
            },
            //级联选择框双向绑定数组
            selectedCateKeys:[],
            //被激活的tab页签
            activeName:'many',
            //动态属性数据
            manyTableData:[], 
            //静态属性数据
            onlyTableData:[],
            //添加参数/属性的对话框 显示与隐藏
            addDialogVisible:false,
            // 添加参数的表单数据对象
            addForm:{
                attr_name:''
            },
            //修改参数对话框的展示与隐藏
            editDialogVisible:false,
            //修改的表单数据对象
            editForm:{},           
            //添加表单验证规则
            addFormRules:{
                attr_name:[
                    
                {required: true, message:'请输入参数名称', trigger: 'blur'}
                    
                ]
            },
            //修改表单的验证规则
            editFormRules:{
                attr_name:[
                    
                    {required: true, message:'请输入参数名称', trigger: 'blur'}
                        
                    ]
            },

        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        //获取所有的商品分类
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
            if(res.meta.status!=200){
                return  this.$message.error('获取商品分类失败！')
            }else{
                this.catelist = res.data
                console.log(this.catelist)
            }
        },
        //级联选择框变化 触发
        async handleChange(){
            this.getParamsDate()
        },
        //tab页签点击事件处理函数
        handleTabClick(){
            console.log(this.activeName)
            this.getParamsDate()
        },
        //获取参数列表数据
        async getParamsDate(){
            if(this.selectedCateKeys.length != 3){
                //选中的不是三级分类
                this.selectedCateKeys = []
                this.manyTableData = []
                this.onlyTableData = []
                this.$message.warning('请选择三级分类')
                return
            }else{
                //是三级分类
                console.log(this.selectedCateKeys)
                //根据所选分类id 获取对应参数
               const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params:{sel:this.activeName}
                })
                if(res.meta.status != 200){
                    return this.$message.error('获取参数列表失败！')
                }else{
                    console.log(res.data)
                    //循环遍历tag标签
                    res.data.forEach(item => {
                        //空字符串返回的是false
                        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
                        //控制文本框的显示与隐藏
                        item.inputVisible = false
                        // 文本框输入的值 
                        item.inputValue = ''
                    });
                    if(this.activeName === 'many'){
                        //动态many
                        this.manyTableData = res.data
                    }else{
                        //静态only
                        this.onlyTableData = res.data
                    }
                }
            }
        },
        //监听对话框的关闭
        addDialogClose(){
            this.$refs.addFormRef.resetFields()
        },
        //点击确定按钮添加参数
        addParams(){
            this.$refs.addFormRef.validate(async vaild=>{
                if(!vaild) return 
                    const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                    attr_name:this.addForm.attr_name,
                    attr_sel:this.activeName
                })
                if(res.meta.status != 201){
                    return this.$message.error('添加参数失败！')
                }else{
                    this.$message.success('添加参数成功！')
                    this.addDialogVisible = false
                    this.getParamsDate()
                }
            })
        },
        //点击编辑按钮触发的对话框
        async showEditDialog(attr_id){
            //查询当前参数的信息
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{
                    params:{attr_sel:this.activeName}
            })
            if(res.meta.status != 200){
                return this.$message.error('获取参数信息失败!')
            }else{
                this.editForm = res.data
            }
            this.editDialogVisible = true
        },
        //点击按钮修改参数
        editParams(){
             this.$refs.editFormRef.validate(async valid=>{
                 if(!valid) return
                const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
                    attr_name:this.editForm.attr_name,
                    attr_sel:this.activeName
                })
                if(res.meta.status != 200){
                    return this.$message.error('修改参数失败！')
                }else{
                    this.$message.success('修改参数成功！')
                    this.getParamsDate()
                    this.editDialogVisible = false
                }
             })
        },
        //点击删除按钮删除参数
        async removeParams(attr_id){
            const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)
            //用户取消删除的操作
            if(confirmResult != 'confirm'){
                return this.$message.info('已经取消删除操作！')
            }else{
                const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
                if(res.meta.status != 200){
                    return this.$message.error('删除参数失败！')
                }else{
                    this.$message.success('删除参数成功！')
                    this.getParamsDate()
                }
            }
        },
        //清空修改参数对话框的表单数据
        editDialogClose(){
                this.$refs.editFormRef.resetFields()
            },
        //文本框失去焦点 或按下回车
        async handleInputConfirm(row){
            //false隐藏input 
            if(row.inputValue.trim().length === 0){
                row.inputValue = ''
                row.inputVisible = false
                return
            }else{
                //合法内容 后续处理
                row.attr_vals.push(row.inputValue.trim())
                row.inputValue = ''
                row.inputVisible = false
                //发起网络请求 保存在数据库
                this.saveAttrVals(row)
            }
            
        },
        //发起网络请求 保存在数据库
        async saveAttrVals(row){
            const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                })
                if(res.meta.status != 200){
                    return this.$message.error('修改参数项失败！')
                }else{
                    this.$message.success('修改参数项成功！')
                }
        },
        //点击按钮显示文本输入框
        showInput(row){
            row.inputVisible = true
            this.$nextTick(_ => {
            this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        //删除tag 标签数据
        handleClose(i,row){
            row.attr_vals.splice(i,1)
            this.saveAttrVals(row)
        }
    },
    computed:{
        // 按钮需要被禁用返回true
        isBtnDisabled(){
            if(this.selectedCateKeys.length != 3){
                return true;
            }else{
                return false;
            }
        },
        //当前选中的三级分类id
        cateId(){
            if(this.selectedCateKeys.length === 3){
                return this.selectedCateKeys[2]
            }else{
                return null;
            }
        },
        tittleText(){
            if(this.activeName == 'many'){
                return '动态参数'
            }else{
                return '静态属性'
            }
        }

        
    }
}
</script>

<style lang="less" scoped>
    .cat_opt{
        margin: 15px 0;
    }
    .el-tag{
        margin: 10px;
    }
    .input-new-tag{
        width: 120px;
    }
</style>